java.lang.Error

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    • java.lang.Error at javax.swing.UIDefaults.getUIError(Unknown Source) at javax.swing.UIDefaults.getUI(Unknown Source) at javax.swing.UIManager.getUI(Unknown Source) at javax.swing.JButton.updateUI(Unknown Source) at javax.swing.AbstractButton.init(Unknown Source) at javax.swing.JButton.<init>(Unknown Source) at javax.swing.JButton.<init>(Unknown Source) at javax.swing.plaf.basic.BasicOptionPaneUI.addButtonComponents(Unknown Source) at javax.swing.plaf.basic.BasicOptionPaneUI.createButtonArea(Unknown Source) at javax.swing.plaf.basic.BasicOptionPaneUI.installComponents(Unknown Source) at javax.swing.plaf.basic.BasicOptionPaneUI.installUI(Unknown Source) at javax.swing.JComponent.setUI(Unknown Source) at javax.swing.JOptionPane.setUI(Unknown Source) at javax.swing.JOptionPane.updateUI(Unknown Source) at javax.swing.JOptionPane.<init>(Unknown Source) at javax.swing.JOptionPane.showOptionDialog(Unknown Source) at javax.swing.JOptionPane.showMessageDialog(Unknown Source) at javax.swing.JOptionPane.showMessageDialog(Unknown Source) at LNFTest.main(LNFTest.java:15)
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